syzkaller login: [ 31.147664] BUG: Bad rss-counter state mm:0000000036c3e0f2 type:MM_FILEPAGES val:33 [ 31.148862] BUG: Bad rss-counter state mm:0000000036c3e0f2 type:MM_ANONPAGES val:22 [ 31.198360] ================================================================== [ 31.199412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.200307] Read of size 8 at addr ffff888015b9d6b0 by task sshd/220 [ 31.201041] [ 31.201255] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.202111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.203151] Call Trace: [ 31.203459] [ 31.203746] dump_stack_lvl+0x91/0xf0 [ 31.204212] print_report+0xcc/0x620 [ 31.204689] ? __virt_addr_valid+0x102/0x340 [ 31.205214] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205821] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206400] kasan_report+0xbe/0xf0 [ 31.206883] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207475] vma_interval_tree_remove+0xc75/0xec0 [ 31.208060] vma_prepare+0xc54/0x11a0 [ 31.208517] __split_vma+0x5af/0x950 [ 31.208983] ? __pfx___split_vma+0x10/0x10 [ 31.209492] ? find_held_lock+0x2c/0x110 [ 31.210011] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.210552] ? lock_is_held_type+0x9f/0x120 [ 31.211099] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211716] ? mtree_range_walk+0x632/0x900 [ 31.212243] ? mas_walk+0x5c7/0x7c0 [ 31.212755] do_vmi_munmap+0x1f1/0x2b0 [ 31.213325] mmap_region+0x1f9/0x2660 [ 31.213848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.214379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.215114] ? __pfx_lock_acquire+0x10/0x10 [ 31.215677] ? __pfx_mmap_region+0x10/0x10 [ 31.216216] ? security_mmap_addr+0x7d/0xa0 [ 31.216760] ? get_unmapped_area+0x1f5/0x3f0 [ 31.217305] do_mmap+0x854/0xf00 [ 31.217774] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.218272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218841] ksys_mmap_pgoff+0x3af/0x500 [ 31.219352] do_syscall_64+0x3f/0x90 [ 31.219840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220482] RIP: 0033:0x7fa3611e7d82 [ 31.220966] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.223130] RSP: 002b:00007fffb839a6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.224051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3611e7d82 [ 31.224926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa360621000 [ 31.225798] RBP: 00007fa360621000 R08: 0000000000000009 R09: 0000000000001000 [ 31.226674] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b0b66a980 [ 31.227531] R13: 00007fffb839a6f0 R14: 00007fffb839a720 R15: 00007fffb839aa80 [ 31.228419] [ 31.228725] [ 31.228940] Allocated by task 213: [ 31.229369] kasan_save_stack+0x22/0x50 [ 31.229911] kasan_set_track+0x25/0x30 [ 31.230409] __kasan_slab_alloc+0x59/0x70 [ 31.230945] kmem_cache_alloc+0x16b/0x370 [ 31.231462] vm_area_dup+0x20/0x160 [ 31.231927] __split_vma+0x170/0x950 [ 31.232399] split_vma+0xc6/0x110 [ 31.232849] mprotect_fixup+0x8d2/0xb30 [ 31.233357] do_mprotect_pkey+0x87e/0xd40 [ 31.233907] __x64_sys_mprotect+0x78/0xc0 [ 31.234431] do_syscall_64+0x3f/0x90 [ 31.234933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235584] [ 31.235814] Freed by task 213: [ 31.236209] kasan_save_stack+0x22/0x50 [ 31.236723] kasan_set_track+0x25/0x30 [ 31.237215] kasan_save_free_info+0x2b/0x50 [ 31.237800] __kasan_slab_free+0x10a/0x190 [ 31.238338] kmem_cache_free+0x10d/0x4d0 [ 31.238862] rcu_core+0x8c8/0x2860 [ 31.239326] __do_softirq+0x1b7/0x7d4 [ 31.239886] [ 31.240093] Last potentially related work creation: [ 31.240659] kasan_save_stack+0x22/0x50 [ 31.241142] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.242324] remove_vma+0x139/0x170 [ 31.242770] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.243303] do_vmi_munmap+0x1f1/0x2b0 [ 31.243780] __vm_munmap+0x138/0x3a0 [ 31.244227] __x64_sys_munmap+0x59/0x80 [ 31.244726] do_syscall_64+0x3f/0x90 [ 31.245187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245822] [ 31.246027] The buggy address belongs to the object at ffff888015b9d658 [ 31.246027] which belongs to the cache vm_area_struct of size 168 [ 31.247426] The buggy address is located 88 bytes inside of [ 31.247426] freed 168-byte region [ffff888015b9d658, ffff888015b9d700) [ 31.248789] [ 31.248996] The buggy address belongs to the physical page: [ 31.249622] page:00000000034407ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b9d [ 31.250710] memcg:ffff88800e0d5e01 [ 31.251138] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251791] page_type: 0xffffffff() [ 31.252244] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.253177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d5e01 [ 31.254165] page dumped because: kasan: bad access detected [ 31.254842] [ 31.255076] Memory state around the buggy address: [ 31.255686] ffff888015b9d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.256543] ffff888015b9d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.257406] >ffff888015b9d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.258314] ^ [ 31.258917] ffff888015b9d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.259793] ffff888015b9d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.260656] ================================================================== [ 31.261580] Disabling lock debugging due to kernel taint [ 33.588427] BUG: Bad rss-counter state mm:0000000005c3a593 type:MM_FILEPAGES val:33 [ 33.589402] BUG: Bad rss-counter state mm:0000000005c3a593 type:MM_ANONPAGES val:22 [ 34.078359] BUG: Bad rss-counter state mm:000000001a960a88 type:MM_FILEPAGES val:33 [ 34.079439] BUG: Bad rss-counter state mm:000000001a960a88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54837' (ECDSA) to the list of known hosts. 2023/06/21 05:43:05 fuzzer started 2023/06/21 05:43:05 dialing manager at localhost:36067 2023/06/21 05:43:05 checking machine... 2023/06/21 05:43:05 checking revisions... [ 34.538553] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:43:05 testing simple program... [ 34.574090] cgroup: Unknown subsys name 'net' [ 34.619832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:43:05 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88801670f948 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88800e667b80 RIP=ffffffff8180f12f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f54053f2900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f54059aa0b0 CR3=000000000ea1e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2035303a33343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f181929ed10 CR3=000000000eac6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=437f4341e27ba8ba0d42f1005dfc2ba9 XMM02=000000000011cb28eff9b2d0a8fce9cb XMM03=000000000011cbf82c67c8bc2e329bc3 XMM04=ad111a9b6d2c767d00000000000ae988 XMM05=9ccb69fde4fdaef80000000000131ff0 XMM06=4fda316b135da52b0000000000131090 XMM07=e042d86d42eb936e00000000001212e8 XMM08=9e0cf7628c86c8cd000000000011cbf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000